drag bolt
nounRail equipment
A strong bolt passing through the drawbar of railway carriages, and serving to fasten the coupling.
Entries starting with D
483 entries.
drag parachute
A parachute deployed behind an aircraft, space shuttle, or motor vehicle as a braking device.
drag path
A skid trail or skid road; a narrow, temporary path created or used by forestry machinery (skidders) to drag felled trees or logs from the stump to a central landing area for processing.
drag-chain
nounRail equipment
The chain that connects together engine and tender, or carriages and wagons.
dragbox
A substantial, often cast metal, part of a locomotive to which the coupling mechanism is attached to allow the locomotive to pull a train.
drain
One terminal of a field effect transistor (FET).
dram
A cart formerly used to haul coal in coal mines.
drape
nounManufacturing
The way in which fabric falls or hangs.
draught engine
An engine used for pumping, raising heavy weights, etc.
draw
verbManufacturing
Senses relating to extracting or selecting.
draw frame
A machine used for processing cotton or other fibers into a yarn.
drawbar
nounRail equipment
An open-mouthed bar at the end of a car, which receives a coupling link and pin by which the car is drawn. It is usually provided with a spring to give elasticity to the connection between the cars of a train.
drawboy
nounManufacturing
A boy who operates the harness cords of a drawloom.
drawer
A wagoner or person who pushes underground tubs.
drawgear
nounRail equipment
The means or parts by which cars or carriages are connected to be drawn.
drawhead
nounRail equipment
The flanged outer end of a drawbar.
drawing frame
A machine in which carded wool, cotton, or similar is drawn out fine.
drawnwork
nounManufacturing
The ornamental working of linen or other fabric by drawing out threads according to a pattern.
drawrod
nounRail equipment
A rod which unites the drawgear at opposite ends of the car, and bears the pull required to draw the train.
drawspring
nounRail equipment
A spring to which a drawbar is attached.
DRC
Initialism of design rule check(ing).
DRCP
Initialism of Dynamic Rapid Configuration Protocol, and extension of DHCP.
DRE
nounAutomotive
Initialism of design release engineer or design and release engineer.
dreadnought
Any type of warship heavier in armour or armament than a typical battleship.
dreikanter
A type of pebble that has three curved faces formed by wind-blown sand.
Dresdenware
A kind of decorated porcelain made near Dresden in Germany.
dress
An item of clothing (usually worn by a woman or young girl) which both covers the upper part of the body and includes a skirt below the waist.
dresser
A kind of pick for shaping large coal.
DRI
nounMetallurgy
Initialism of direct reduced iron
drift
A passage driven or cut between shaft and shaft; a driftway; a small subterranean gallery.
drift mine
Any mine reached by a drift (horizontal or inclined passage) from the surface.
drifter
A person employed in driving in rock other than coal.
driftway
A drift, or horizontal passage in a mine.
drillable
adjectiveMechanical engineering
Having an arm or manipulator that can position the tool or attachment at the end in different orientations.
drip edge
A metal flashing or other overhanging component with an outward projecting lower edge, intended to control the direction of dripping water and help protect underlying building components.
drive
To dig horizontally; to cut a horizontal gallery or tunnel.
drive out
To set closely; to take up less space because the typesetter uses type that is thinner than the copy or the typesetter whites out more or squeezes in more lines on each page.
drive stick
To drive a stickshift vehicle.
drive unit
A mechanical system that provides the reciprocating motion for shaker conveyors, which transport ore or coal along underground trough lines.
drive wheel
One of the wheels of a motor vehicle that drives (in the engineering sense), that is, one of the wheels that takes power from the drivetrain and applies it to the ground so as to propel the vehicle.
drive-by-wire
nounAutomotive
The use of electrical or electromechanical systems to perform vehicle functions traditionally achieved by mechanical linkages.
driveline
nounAutomotive
The drivetrain minus the engine and transmission
driver-only operation
nounRail equipment
The operation of a train without a conductor or guard as a cost-cutting measure; one-man operation.
drivetrain
The mechanical parts of the powertrain, the gears and shafts, that connect the engine to the wheels in a vehicle.
driving car
nounRail equipment
A control car; a non-engine rail car from which the train may be driven.
driving motor
nounRail equipment
a car in a multiple unit which is motored and from which the train can be driven.
driving under the influence
nounAutomotive
Operating a motor vehicle while impaired due to the consumption of drugs or alcohol.
driving van trailer
nounRail equipment
a purpose-built railway vehicle that allows the driver to operate a locomotive at the opposite end of a train.
driving wheel
nounRail equipment
On a steam locomotive, a powered wheel driven by the locomotive's pistons or turbine.
DRL
nounAutomotive
Initialism of daytime running lights, headlights that cannot be turned off, intended to make cars more visible during the day.
DRO
Initialism of distant retrograde orbit.
drone
Any remotely operated or autonomous underwater vehicle, especially when multiple such vehicles are operated from a larger vessel.
droop
A hinged portion of the leading edge of an aeroplane's wing, which swivels downward to increase lift during takeoff and landing.
drop
nounManufacturing
A decline in degree, quality, quantity, or rate.
drop hammer
A heavy weight that is raised and then allowed to drop, as used for piledriving and drop-forging.
drop kerb
A kerb of reduced height to allow vehicles access to properties adjoining a road, or to assist wheelchair users.
drop light
nounRail equipment
A window in a train carriage that is opened by pushing it downward into the door.
drop tank
A portable tank used at the scene of a fire to hold water from the fire engine.
drop-in
adjectiveManufacturing
Fit to substitute for some element in a complex system without changes to the existing infrastructure.
dropbox
nounManufacturing
An enhancement to a loom that allows patterns of multiple colors to be woven from the same loom.